/* * (C) Copyright 2004, Li-Pro.Net <www.li-pro.net> * Stephan Linz <linz@li-pro.net> * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */#include <common.h>#include <command.h>#include <nios.h>#include <nios-io.h>#if	defined(CONFIG_HW_WATCHDOG)#if !defined(CONFIG_HW_WDENA_BASE)#error "*** CONFIG_HW_WDENA_BASE not defined ***"#if !defined(CONFIG_HW_WDENA_BIT)#error "*** CONFIG_HW_WDENA_BIT not defined ***"#endif#endif#if !defined(CONFIG_HW_WDTOG_BASE)#error "*** CONFIG_HW_WDTOG_BASE not defined ***"#if !defined(CONFIG_HW_WDTOG_BIT)#error "*** CONFIG_HW_WDTOG_BIT not defined ***"#endif#endif#ifdef	CONFIG_HW_WDPORT_WRONLY	/* emulate read access */static unsigned __wd_ena_pio_portval = 0;#endif#define	WD_PIO_INIT_DONE(V)	((V) & (1 << CONFIG_HW_WDENA_BIT))void ssv_wd_pio_init(void){	nios_pio_t *ena_piop	 = (nios_pio_t*)CONFIG_HW_WDENA_BASE;	nios_pio_t *trg_piop	 = (nios_pio_t*)CONFIG_HW_WDTOG_BASE;	trg_piop->data		&= ~(1 << CONFIG_HW_WDTOG_BIT);#ifdef	CONFIG_HW_WDPORT_WRONLY	/* emulate read access */	__wd_ena_pio_portval	|= (1 << CONFIG_HW_WDENA_BIT);	ena_piop->data		 = __wd_ena_pio_portval;#else	/* !CONFIG_HW_WDPORT_WRONLY */	trg_piop->direction	|= (1 << CONFIG_HW_WDTOG_BIT);	ena_piop->data		|= (1 << CONFIG_HW_WDENA_BIT);	ena_piop->direction	|= (1 << CONFIG_HW_WDENA_BIT);#endif	/* CONFIG_HW_WDPORT_WRONLY */}void ssv_wd_pio_done(void){	nios_pio_t *piop	 = (nios_pio_t*)CONFIG_HW_WDENA_BASE;#ifdef	CONFIG_HW_WDPORT_WRONLY	/* emulate read access */	__wd_ena_pio_portval	&= ~(1 << CONFIG_HW_WDENA_BIT);	piop->data		 = __wd_ena_pio_portval;#else	/* !CONFIG_HW_WDPORT_WRONLY */	piop->data		&= ~(1 << CONFIG_HW_WDENA_BIT);#endif	/* CONFIG_HW_WDPORT_WRONLY */}void ssv_wd_pio_reset(void){	nios_pio_t *trg_piop	 = (nios_pio_t*)CONFIG_HW_WDTOG_BASE;#ifdef	CONFIG_HW_WDPORT_WRONLY	if (WD_PIO_INIT_DONE(__wd_ena_pio_portval))#else	nios_pio_t *ena_piop	 = (nios_pio_t*)CONFIG_HW_WDENA_BASE;	if (WD_PIO_INIT_DONE(ena_piop->data))#endif	{		trg_piop->data	|=  (1 << CONFIG_HW_WDTOG_BIT);		trg_piop->data	&= ~(1 << CONFIG_HW_WDTOG_BIT);	}}void hw_watchdog_reset(void){	int re_enable = disable_interrupts ();	ssv_wd_pio_reset();	if (re_enable)		enable_interrupts ();}#if (CONFIG_COMMANDS & CFG_CMD_BSP)int do_wd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]){	nios_pio_t *ena_piop	 = (nios_pio_t*)CONFIG_HW_WDENA_BASE;	switch (argc)	{	case 1:		printf ("Watchdog timer status is %s\n",#ifdef	CONFIG_HW_WDPORT_WRONLY				WD_PIO_INIT_DONE(__wd_ena_pio_portval)#else				WD_PIO_INIT_DONE(ena_piop->data)#endif				? "on" : "off");		return 0;	case 2:		if (!strcmp(argv[1],"on"))		{			ssv_wd_pio_init();			printf("Watchdog timer now is on\n");			return 0;		}		else if (!strcmp(argv[1],"off"))		{			ssv_wd_pio_done();			printf("Watchdog timer now is off\n");			return 0;		}		break;	default:		break;	}	printf ("Usage:\n%s\n", cmdtp->usage);	return 1;}U_BOOT_CMD(	wd,	2,	1,	do_wd,	"wd      - check and set watchdog\n",	"on   - switch watchDog on\n"	"wd off  - switch watchdog off\n"	"wd      - print current status\n");#endif	/* CFG_CMD_BSP */#endif	/* CONFIG_HW_WATCHDOG */